Paul Romatschke- University of Colorado

Title: phi^4 Theory in the Large N Wonderland

Abstract: In this seminar, I introduce large N techniques to solve
hard problems in quantum mechanics, such as calculating the ground
state energy of the quartic oscillator. Steepest descent and Lefshetz
Picard Theory will be touched upon. The large N method generalizes to
field theory, and I will review quantum triviality of phi^4 theory in
4 dimensions in the continuum, and how it is avoided in the large N